152.81% is the change from 320 to 809
Calculation steps:
[( 809 - 320 ) ÷ 320] x 100 = 152.81%
Formula
Percentage change = [(809 - 320) / 320] x 100
Subtract the new number by the original number
809 - 320 = 489
489 ÷ 320 = 1.528125
1.528125 x 100 = 152.81%